can b12 injections increase ferritin levels Uncommon” Common Causes of Iron Deficiency : r/Anemic If you have a low

Possible Side Effects Most clients experience no issues, but mild side effects can occasionally occur, such as: Slight redness or soreness at the injection site Temporary fatigue or lightheadedness Mild bruising (rare) These effects usually resolve quickly

Rare allergic reactions (particularly in individuals sensitive to sulfa, due to methionine)

Vitamin B12 injections deliver a purified form of vitamin B12 directly into the muscle or under the skin, bypassing the digestive system for rapid absorption

NG239 Evidence review G: monitoring for gastric cancer in people with vitamin B12 deficiency due to autoimmune gastritis

Serious but rare risks include pancreatitis, kidney injury, gallbladder disease, and based on animal studies a potential risk of thyroid C-cell tumors